Surah Al-Anbya 21:3

لَاهِيَةً قُلُوبُهُمْ ۗ وَأَسَرُّوا۟ ٱلنَّجْوَى ٱلَّذِينَ ظَلَمُوا۟ هَلْ هَـٰذَآ إِلَّا بَشَرٌ مِّثْلُكُمْ ۖ أَفَتَأْتُونَ ٱلسِّحْرَ وَأَنتُمْ تُبْصِرُونَ

With their hearts distracted. And those who do wrong conceal their private conversation, [saying], "Is this [Prophet] except a human being like you? So would you approach magic while you are aware [of it]?"

Translation: Saheeh International

Tafsir

with their hearts preoccupied heedless of its meanings. And they are secret in their conference their speech they the evildoers alladhīna zalamū a substitution for the third person plural indicator wāw of wa-asarrū’l-najwā ‘and they are secret in conference’ ‘Is this namely Muhammad (s) other than a mortal human being …

Excerpt from Tafsir al-Jalalayn, commentary on 21:3, via Quran.com. The reader has the full commentary and 9 more tafsirs.